Until they are built, it's all talk.
https://www.cnbc.com/2021/04/21/foxconn-mostly-abandons-10-b...
They are built, at least one in Phoenix:
> As of 2025, the first fab has been completed and is producing four-nanometer (nm) chips.
alt Hacker News
They are built, at least one in Phoenix:
> As of 2025, the first fab has been completed and is producing four-nanometer (nm) chips.